Abstract
The F 1 and F 2 generations of a twenty parent fractional diallel cross of opium poppy (P. somniferum L.) were analyzed for combining ability for ten quantitative and five quality (alkaloids) traits. The results indicated significant differences among the parents for combining ability for all the traits. The GCA and SCA components of variances were significant for all the characters. However, the SCA component of variance (δ 2s) was predominant indicating the preponderance of non-additive gene effect for all the traits except for leaves/plant and papaverine in F1 hybrids. The average degree of dominance (δ 2s/δ 2g) was more than unity indicating over dominance and also confirming non-additive mode of gene action. Among the parents IS-16, IS-13 and NBRI-1 for early flowering, BR226 and BR241 for branches/plant, capsule weight/plant, seed yield/plant and husk yield/plant, BR227 for leaves/plant, UO1285 for capsule size and opium yield/plant, NBRI-5 for husk yield/plant, morphine, codeine, and thebaine and ‘Papline’ for plant height and papaverine content were found good general combiners. Parent ND1001 was good combiner for codeine and narcotine content. Inclusion of good general combiners in a multiple crossing program or an intermating population involving all the possible crosses among them subjected to bi-parental mating may be expected to offer maximum promise in breeding for higher opium, seed yield and alkaloid contents.
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Acknowledgments
Authors thank to the Director, NBRI, Lucknow for encouragement and facilities provided during the investigation. Financial support given by Chief Controller Factories (CCF), Govt. Opium and Alkaloids Works, Dept. of Revenue; Ministry of Finance, Govt. of India, Now Delhi is gratefully acknowledged. H. K. Yadav also thanks to CSIR for financial Support.
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Yadav, H.K., Shukla, S. & Singh, S.P. Genetic combining ability estimates in the F1 and F2 generations for yield, its component traits and alkaloid content in opium poppy (Papaver somniferum L.). Euphytica 168, 23–32 (2009). https://doi.org/10.1007/s10681-008-9872-5
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DOI: https://doi.org/10.1007/s10681-008-9872-5